package com.community.windy.entity;

public class Page {
    //当前的页码
    private int current = 1;
    //显示每页上限
    private int limit = 10;
    //数据总数
    private int rows;
    //查询路径（用于复用分页链接）
    private String path;

    public int getCurrent() {
        return current;
    }

    public void setCurrent(int current) {
        if (current>=1)
            this.current = current;
    }

    public int getLimit() {
        return limit;
    }

    public void setLimit(int limit) {
        if (limit>1&&limit<100){
            this.limit = limit;
        }

    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        if (rows>=0)
            this.rows = rows;
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    //获取当前页的起始行
    public int getOffset(){
        //current * limit - limit
        return (current - 1) * limit;
    }

    //获取总页数
    public int getTotal(){
        //rows / limit [+1]
        if(rows % limit == 0){
            return rows / limit;
        }else{
            return rows / limit + 1;
        }
    }

    //获取起始页码
    public int getFrom(){
        int from = current - 2;
        return from < 1 ? 1 : from;
    }


    //获取结束页码
    public int getTo(){
        int to = current + 2;
        int total = getTotal();
        return to > total ? total : to;
    }
}
